Just in case you’re still struggling with inspiration there are a load of online resources to help you. Pinterest is always a good starting point but the two projects below are also packed with ideas.
The 1000 Journals Project is an ongoing collaborative experiment attempting to follow 1000 journals throughout their travels. The goal is to provide a method for interaction and shared creativity among friends and strangers – http://www.1000journals.com/about/. They also have a Facebook page – https://www.facebook.com/1001Journals/
https://www.sketchbookproject.com/ is run by an independent Brooklyn-based company that organizes global, collaborative art projects. The Sketchbook Project, is a crowd-sourced library that features 35,411 artists’ books contributed by creative people from 135+ countries.